The U.S. Nuclear Regulatory Commission (NRC) said Mitsubishi Heavy Industries was responsible for the failures that led to the permanent closure of San Onofre Nuclear Generating Station.
The NRC issued a preliminary public notice September 23 that said MHI’s computer models did not detect vibrations that badly damaged a system of steam generators that was also built by MHI.
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The NRC also said SCE parent company Edison International’s failure to catch the design flaw that led to the damage constituted a low to moderate safety violation.
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